My question is how can I print an existing PDF via bluetooth thermal printer

Question

How can I connect already loaded PDF into bluetooth thermal printer.

How can I connect already loaded PDF into bluetooth thermal printer.

Answer 1

Add the following plugin in pubspec.yaml:

dependencies:

  path_provider: ^1.6.27

Update the version number to whatever is current.

And import it in your code.

import 'package:path_provider/path_provider.dart';

You also have to import dart:io to use the File class.

import 'dart:io';

 Future <List<int>> _readPDFFile() async {
      try {
        final Directory directory = await getApplicationDocumentsDirectory();
        final File file = File('${directory.path}/my_file.pdf');
final bytes = File(file.path).readAsBytesSync();
      } catch (e) {
        print("Couldn't read file");
      }
      return bytes;
    }

use thermal printer package link = bluetooth_thermal_printer: ^0.0.6

finally send those bytes data into thermal printer

Future<void> printRecipientPaper() async {
    String isConnected = await BluetoothThermalPrinter.connectionStatus;
    if (isConnected == "true") {
      List<int> bytes = await _readPDFFile();
      final result = await BluetoothThermalPrinter.writeBytes(bytes);
      print("Print $result");
    } else {
      //Hadnle Not Connected Senario
    }
  }

if you have image in pdf file you can follow below link as well How to convert a PDF file to an image with Flutter?